首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Conventional wisdom says trees are good for the environment. They absorb carbon dioxide—a greenhouse gas—from the atmosphere and
Conventional wisdom says trees are good for the environment. They absorb carbon dioxide—a greenhouse gas—from the atmosphere and
admin
2016-12-08
29
问题
Conventional wisdom says trees are good for the environment. They absorb carbon dioxide—a greenhouse gas—from the atmosphere and store it as carbon while releasing oxygen, a process for which forests have been called "the lungs of the planet". The roots of trees have been thought to trap sediments and nutrients in the soil. Trees have also been credited with steadying the flow of these rivers, keeping it relatively constant through wet and dry seasons, thus preventing both drought and flooding. It is all nonsense, concludes a research published this week. A four-year international study led by researchers at the University of Newcastle, in Britain, and the Free University of Amsterdam, identifies several myths about the link between forests and water. For example, in arid and semiarid areas, trees consume far more water than they trap. And it is not the trees that catch sediments and nutrients, and steady the flow of the rivers, but the fact that the soil has not been compressed.
The World Commission on Water estimates that the demand for water will increase by around 50% in the next 30 years. Moreover, around 4 billion people—one half of the world’s population— will live in conditions of severe water stress, meaning they will not have enough water for drinking and washing to stay healthy, by 2025.
The government of South Africa has been taking a tough approach to trees since it became the first to treat water as a basic human right in 1998. Trees lose water through evaporation(the technical term is transpiration)at twice the rate of grassland or South Africa’s unique fynbos scrubland. In a scheme praised by the hydrologists, the state penalizes forestry companies for preventing this water from reaching rivers and underground aquifers.
In India, large tree-planting schemes not only lose valuable water but complicate the true problem identified by the hydrologists: the unregulated removal of water from aquifers to irrigate crops. Farmers need no permit to drill a borehole and, as most farmers receive free electricity, there is little economic control on the volume of water pumped. In the Kolar district in Karnataka, wells have dried up as the water table has plummeted from six metres to 150 metres below ground.
Questions 71—75
Complete the summary with a maximum of two words from the passage, changing the form where necessary.
It is commonly believed that trees are good for the environment, as they absorb carbon dioxide and release oxygen: the roots of trees can trap water and【R1】______ the flow of rivers. However, a recent study has found that this belief is【R2】______.
According to the research, trees lose【R3】______ water through evaporation than they trap. In South Africa, forestry companies are punished as the trees they planted prevented water from【R4】______ rivers and underground aquifers. In India, farmers drilled many wells and used the underground water to【R5】______their farmland. This has lowered water table to 150 metres below ground. Many trees have been planted and in fact these trees complicate the existing problem.
【R3】
选项
答案
(far)more
解析
由文章可知树木有时消耗的水分比所留下的多得多。
转载请注明原文地址:https://kaotiyun.com/show/4BjK777K
本试题收录于:
D类竞赛(专科)题库大学生英语竞赛(NECCS)分类
0
D类竞赛(专科)
大学生英语竞赛(NECCS)
相关试题推荐
StopBeingaPeoplePleaser1.Say"no"■Givereasonsinsteadof【T1】______excuses【T1】______■Examples■It’ss
StopBeingaPeoplePleaser1.Say"no"■Givereasonsinsteadof【T1】______excuses【T1】______■Examples■It’ss
Chocolate:The"FoodoftheCods’"1.Thehistoryofchocolate■Theobromacacao—"foodofthegods"■peopleof【T1】__
CanTeachingGrammarReallyBeFun?【T1】______amongaverageteachers【T1】______TeachinggrammarisboringGrammarcanbetaught
CanTeachingGrammarReallyBeFun?【T1】______amongaverageteachers【T1】______TeachinggrammarisboringGrammarcanbetaught
MineralsMineralsarenon-organicsubstanceswhichcontaintheelementcarbon./Buttheyarevitalforgoodhealth/and
WisdomTeethWisdomteetharenormallythelastteethtoappear./Thisusuallyhappenswhenpeopleareintheirlatetee
(1)JustwhenTransportforLondon(TfL)thoughtthebikehireschemeprovidedananswertoLondon’scarbonemissionsproblem,th
(1)Aconventionalteacher’slicenseusuallyrequiresauniversitydegreeineducationplusanunpaidtermofpracticeteaching.
A.absorbsB.attemptC.misleadingD.rewardingE.dimensionF.pervasiveG.uni-direc
随机试题
总效用在________时达到最大值。()
下列哪项符合血源性肺脓肿的特点
A.凿开骨皮质,找到脓腔,清除脓液,关闭伤口,可愈合B.立即开放创口引流,全身应用抗生素,石膏固定,开洞换药C.早期进行切开引流术,闭式引流或开放引流D.清除病灶死骨,消灭死腔,一期闭合伤口,接负压引流管E.截肢术创伤性骨髓炎的治疗方法是
DP公司质量检验员李先于2005年通过了全国质量专业技术人员职业资格考试后,被公司任命为质量部经理。李经理认为公司运作应以顾客为关注焦点,主动进行顾客满意度调查非常重要。为此,李经理设计了顾客满意度调查问卷,从公司前两年的顾客名单中随机抽取125名进行了调
(2016·河南)在教学中,如果学生能利用旧知识去同化新知识,那么,“接受式学习”就有意义。()
学校、幼儿园、托儿所和公共场所发生突发事件时,应当优先救护()
从法律的实质内容来看,我国社会主义法律的科学性和先进性主要体现在()
FinancialRisksSeveraltypesoffinancialriskareencounteredininternationalmarketing;themajorproblemsincludecommercia
A.unpaidB.obviousC.differedD.linkE.disproportionatelyF.whetherG.explanationsH.madeupI.roleJ.shoulder
A—collectiveactionI—psychologicalsupportB—competitoranalysisJ—performance-relatedpayC—corporaterestructuringK—paysecr
最新回复
(
0
)